Machine for cutting diamonds.



PATENTED DEC. 20, 1904 No. 778,059.v

J. DE MINISZEWSKI. MACHINE FOR CUTTING DIAMONDS.

APPLICATION FILED MAR.19, 1903.

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N0 MODEL.

PATENIND DB0. 2o, 1904 I. DE M INISZBWSKI. MACHINE FON CUTTING DIAMONDS.

A APPLICATION FILED MAR. 19, 1903. N O MODEL.y

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' NmnnmuunuNNNmmnmnn N MINNNNImmununuunnm N I UNITED STATES Patented. December 20, 1904,

'PATENT OFFICE.

JOSEPH DE MINISZEWSKI, OF KVVASOW', RUSSIA, 'ASSIGNOR TO INOOENOIO FERNANDEZ, OF STANTULLANO, SPAIN.

MACHINE FonwcuTTlNe. DIAMONDS.

SPECIFICATION forming part of 'Lettere Patent Ne. 778,059, dated December 2o, 1904.

Application led March 19,1903. Serial No. 148,551.

To @ZZ whom, it may concern:

Be it known that I, JOSEPH Dn MINIsZEWsKI, engineer, of Kwasow, district of Stopnica, Kielce, Russia, have invented an Improved Machine for Cutting Diamonds, of whichthe following is a full, clear, and exact description.

This invention relates to a new or improved machine for cutting diamonds and other-,hard substances by means of a steel wire turning about itself and coated with a hard ymaterial diluted in a suitable iuid, a very slow translating motion being at same time imparted to this wire.

Reference is to be had to the accompanying drawings, in which-- Figure l is an elevation of a diamond-cut?.

a kind of cap g, the edges g of which form abrake acting upon a spool t, loosely mounted upon a spindle a'. The spool Zt receives the wire j Intended to cut the diamond, placed as shown in Ze. For this purpose this wire, Y

maintained by a support Z, passes through the spindle a', which is made hollow to this effect and comes out through a hole Vmade through a jewel m, enchased in a support n. This wire after coming into contact with the diamond to;

be cut passes through another rubyor dia` mond m', enchased wi thin a support n', reachesV a stretcher o, where it makes two turns, then passes into the shaft a", and finally comes out through theend 0I' the machine. The wire on the spool ZL is maintained by means oa brake q, acting as a spring and connected with the spindle a' in order to prevent the wire from unwinding from the spool in case this wire would break. Another spindle r is arranged parallelly with the spindle ri and is provided with pulleys s for the transmission-shaft and with gears at c. The gear i meshes with a pinion which causes the spindle z' to turn. The

gear u meshes with a pinion u, which causes the spindle rl to turn. The spindles z' and a" rotate at the same speed. These gears impart a very fast rotary motion to the wire. Finally, the gear c operates a pinion c', loosely mounted upon the spindle 7l' and slowly operating the stretcher 0 in order to give the wire a very'slow longitudinal translating motion. The wirejis applied to the stretcher o by means of a sort of roller pivotedV at the end of a handle y, provided with a spring a, which constantly presses the roller w against the wire.

The wire j on coming out is cut on a knife 1, and the ends of this wire fall into a receptacle 2.

The diamond lc is maintained at the end of a support 3, pivoted at 4: and provided with a counterweight 5. As the cut of the diamond proceeds the counterweight 5 provides for the displacement of the diamond by causing the support 3 to pivot around its joint 4, so that fthe diamond will always be in contact with the cutting-wire. l

The forms, details, accessories, materials, and sizes of thismachine may of course vary without departing fromthe 'principle of this invention.

l. A gem-cutting machine comprising a spool, a wire wound on the spool, means for drawing the wire froml the spool, and means for rotating the wire.

2. A gem-cutting machine comprising rotary tubular spindles, means for rotating the spindles, a wire rotating with the spindles, and-means for moving the wire lengthwise through the spindles.

3. A gem-cutting machine comprising rotary tubular spindles, spaced apart, a gernholder between the spindles, a wire extended the spindles and gems, and a swinging gernsupport between the spindles.

The foregoing specification of my improved machine for cutting diamonds signed by me this 28th day of February, 1903.

JOSEPH DE MINISZEVVSKL Witnesses:

J. ALLIsoN BOWEN, MAURICE H. PIGNET.

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